E21B 34/06
In wells
Official title: in wells
E21B34/06 (In wells) appears on 7,242 US grants and 6,529 published applications in this corpus.
Search patents in E21B- Granted patents
- 7,242
- Published applications
- 6,529
- Assignees
- 1,220
- Inventors
- 7,293
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 44 | 0 |
| 1977 | 42 | 0 |
| 1978 | 44 | 0 |
| 1979 | 26 | 0 |
| 1980 | 27 | 0 |
| 1981 | 65 | 0 |
| 1982 | 56 | 0 |
| 1983 | 60 | 0 |
| 1984 | 80 | 0 |
| 1985 | 55 | 0 |
| 1986 | 71 | 0 |
| 1987 | 84 | 0 |
| 1988 | 51 | 0 |
| 1989 | 60 | 0 |
| 1990 | 63 | 0 |
| 1991 | 49 | 0 |
| 1992 | 50 | 0 |
| 1993 | 63 | 0 |
| 1994 | 77 | 0 |
| 1995 | 47 | 0 |
| 1996 | 47 | 0 |
| 1997 | 20 | 0 |
| 1998 | 63 | 0 |
| 1999 | 83 | 0 |
| 2000 | 70 | 0 |
| 2001 | 108 | 34 |
| 2002 | 77 | 85 |
| 2003 | 85 | 85 |
| 2004 | 79 | 116 |
| 2005 | 59 | 73 |
| 2006 | 86 | 86 |
| 2007 | 64 | 106 |
| 2008 | 73 | 108 |
| 2009 | 78 | 181 |
| 2010 | 133 | 134 |
| 2011 | 112 | 221 |
| 2012 | 125 | 241 |
| 2013 | 165 | 325 |
| 2014 | 219 | 335 |
| 2015 | 251 | 427 |
| 2016 | 329 | 436 |
| 2017 | 348 | 394 |
| 2018 | 375 | 439 |
| 2019 | 489 | 409 |
| 2020 | 430 | 418 |
| 2021 | 437 | 441 |
| 2022 | 444 | 396 |
| 2023 | 402 | 333 |
| 2024 | 389 | 297 |
| 2025 | 297 | 257 |
| 2026 | 191 | 152 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- E21B 34/10Operated by control fluid supplied from outside the borehole2,609
- E21B 34/14Operated by movement of tools2,219
- E21B 34/063Valve or closure with destructible element1,101
- E21B 34/08Responsive to flow or pressure of the fluid obtained1,029
- E21B 34/066Electrically actuated785
- E21B 34/12Operated by movement of casings or tubings537
Recent patents
- Flow control system having a rate limiting device for well systems6 Oct 2026US 12,753,673 B2Halliburton Energy Services.Inc.
- Safety valve, well system, and method employing a temperature sensor29 Sep 2026US 12,747,648 B2Halliburton Energy Services.Inc.
- Safety valve, well system, and method employing an electrical sensor29 Sep 2026US 12,747,649 B2Halliburton Energy Services.Inc.
- Depth activated downhole adjustable bend assemblies22 Sep 2026US 12,742,360 B2National Oilwell Varco, L. P.
- Well mender22 Sep 2026US 12,742,365 B2
- Apparatus for recovering debris from a wellbore8 Oct 2026US 2026/0308994 A1Grant Prideco, L.P.
- System for delayed dissolution of downhole balls8 Oct 2026US 2026/0309002 A1Tenax Energy Systems, LLC
- Bi-directional Running Tool for Expandable Liner Hanger8 Oct 2026US 2026/0309007 A1Halliburton Energy Services.Inc.
- Methods and systems for performing hydraulic fracturing operations8 Oct 2026US 2026/0309013 A1ExxonMobil Technology and Engineering Company
- Hydraulic fracturing method using lightweight proppant particles to reduce erosion and improve conductivity8 Oct 2026US 2026/0309016 A1ExxonMobil Technology and Engineering Company
Most cited
By later US patents
- Controlling hydrocarbon production609US 10,677,035 B2Saudi Arabian Oil Company · 2020
- Downhole surge pressure reduction system and method of use340US 5,960,881 AJerry P. Allamon · 1999
- System for completing multiple well intervals336US 7,387,165 B2Schlumberger Technology Corporation · 2008
- Petroleum well having downhole sensors, communication and power268US 6,679,332 B2Shell Oil Company · 2004
- Temporary plug system266US 5,479,986 AHalliburton Company · 1996